Merge changes Id4971e54,Id80da21c,Ice446ec4,If10f00de,I4f59ad60 am: 8f0b7f288c... (82adab51) · Commits · e / os / android_frameworks_native

libs/binder/BpBinder.cpp

+2 −1

Original line number	Diff line number	Diff line
		@@ -273,7 +273,8 @@ status_t BpBinder::transact(

		status_t status;
		if (CC_UNLIKELY(isRpcBinder())) {
		status = rpcSession()->transact(rpcAddress(), code, data, reply, flags);
		status = rpcSession()->transact(sp<IBinder>::fromExisting(this), code, data, reply,
		flags);
		} else {
		status = IPCThreadState::self()->transact(binderHandle(), code, data, reply, flags);
		}

libs/binder/RpcServer.cpp

+6 −4

Original line number	Diff line number	Diff line
		@@ -193,10 +193,12 @@ bool RpcServer::shutdown() {

		mShutdownTrigger->trigger();
		while (mJoinThreadRunning \|\| !mConnectingThreads.empty() \|\| !mSessions.empty()) {
		ALOGI("Waiting for RpcServer to shut down. Join thread running: %d, Connecting threads: "
		"%zu, Sessions: %zu",
		if (std::cv_status::timeout == mShutdownCv.wait_for(_l, std::chrono::seconds(1))) {
		ALOGE("Waiting for RpcServer to shut down (1s w/o progress). Join thread running: %d, "
		"Connecting threads: "
		"%zu, Sessions: %zu. Is your server deadlocked?",
		mJoinThreadRunning, mConnectingThreads.size(), mSessions.size());
		mShutdownCv.wait(_l);
		}
		}

		// At this point, we know join() is about to exit, but the thread that calls

libs/binder/RpcSession.cpp

+9 −8

Original line number	Diff line number	Diff line
		@@ -86,8 +86,7 @@ bool RpcSession::addNullDebuggingClient() {
		return false;
		}

		addClientConnection(std::move(serverFd));
		return true;
		return addClientConnection(std::move(serverFd));
		}

		sp<IBinder> RpcSession::getRootObject() {
		@@ -100,12 +99,12 @@ status_t RpcSession::getRemoteMaxThreads(size_t* maxThreads) {
		return state()->getMaxThreads(connection.fd(), sp<RpcSession>::fromExisting(this), maxThreads);
		}

		status_t RpcSession::transact(const RpcAddress& address, uint32_t code, const Parcel& data,
		status_t RpcSession::transact(const sp<IBinder>& binder, uint32_t code, const Parcel& data,
		Parcel* reply, uint32_t flags) {
		ExclusiveConnection connection(sp<RpcSession>::fromExisting(this),
		(flags & IBinder::FLAG_ONEWAY) ? ConnectionUse::CLIENT_ASYNC
		: ConnectionUse::CLIENT);
		return state()->transact(connection.fd(), address, code, data,
		return state()->transact(connection.fd(), binder, code, data,
		sp<RpcSession>::fromExisting(this), reply, flags);
		}

		@@ -199,7 +198,8 @@ void RpcSession::join(unique_fd client) {
		state()->getAndExecuteCommand(connection->fd, sp<RpcSession>::fromExisting(this));

		if (error != OK) {
		ALOGI("Binder connection thread closing w/ status %s", statusToString(error).c_str());
		LOG_RPC_DETAIL("Binder connection thread closing w/ status %s",
		statusToString(error).c_str());
		break;
		}
		}
		@@ -311,24 +311,25 @@ bool RpcSession::setupOneSocketClient(const RpcSocketAddress& addr, int32_t id)

		LOG_RPC_DETAIL("Socket at %s client with fd %d", addr.toString().c_str(), serverFd.get());

		addClientConnection(std::move(serverFd));
		return true;
		return addClientConnection(std::move(serverFd));
		}

		ALOGE("Ran out of retries to connect to %s", addr.toString().c_str());
		return false;
		}

		void RpcSession::addClientConnection(unique_fd fd) {
		bool RpcSession::addClientConnection(unique_fd fd) {
		std::lock_guard<std::mutex> _l(mMutex);

		if (mShutdownTrigger == nullptr) {
		mShutdownTrigger = FdTrigger::make();
		if (mShutdownTrigger == nullptr) return false;
		}

		sp<RpcConnection> session = sp<RpcConnection>::make();
		session->fd = std::move(fd);
		mClientConnections.push_back(session);
		return true;
		}

		void RpcSession::setForServer(const wp<RpcServer>& server, int32_t sessionId,

libs/binder/RpcState.cpp

+132 −105

Original line number	Diff line number	Diff line
		@@ -207,45 +207,49 @@ RpcState::CommandData::CommandData(size_t size) : mSize(size) {
		mData.reset(new (std::nothrow) uint8_t[size]);
		}

		bool RpcState::rpcSend(const base::unique_fd& fd, const char* what, const void* data, size_t size) {
		status_t RpcState::rpcSend(const base::unique_fd& fd, const char* what, const void* data,
		size_t size) {
		LOG_RPC_DETAIL("Sending %s on fd %d: %s", what, fd.get(), hexString(data, size).c_str());

		if (size > std::numeric_limits<ssize_t>::max()) {
		ALOGE("Cannot send %s at size %zu (too big)", what, size);
		terminate();
		return false;
		return BAD_VALUE;
		}

		ssize_t sent = TEMP_FAILURE_RETRY(send(fd.get(), data, size, MSG_NOSIGNAL));

		if (sent < 0 \|\| sent != static_cast<ssize_t>(size)) {
		int savedErrno = errno;
		ALOGE("Failed to send %s (sent %zd of %zu bytes) on fd %d, error: %s", what, sent, size,
		fd.get(), strerror(errno));
		fd.get(), strerror(savedErrno));

		terminate();
		return false;
		return -savedErrno;
		}

		return true;
		return OK;
		}

		bool RpcState::rpcRec(const base::unique_fd& fd, const sp<RpcSession>& session, const char* what,
		void* data, size_t size) {
		status_t RpcState::rpcRec(const base::unique_fd& fd, const sp<RpcSession>& session,
		const char* what, void* data, size_t size) {
		if (size > std::numeric_limits<ssize_t>::max()) {
		ALOGE("Cannot rec %s at size %zu (too big)", what, size);
		terminate();
		return false;
		return BAD_VALUE;
		}

		if (status_t status = session->mShutdownTrigger->interruptableReadFully(fd.get(), data, size);
		status != OK) {
		if (status != -ECANCELED) {
		ALOGE("Failed to read %s (%zu bytes) on fd %d, error: %s", what, size, fd.get(),
		statusToString(status).c_str());
		return false;
		}
		return status;
		}

		LOG_RPC_DETAIL("Received %s on fd %d: %s", what, fd.get(), hexString(data, size).c_str());
		return true;
		return OK;
		}

		sp<IBinder> RpcState::getRootObject(const base::unique_fd& fd, const sp<RpcSession>& session) {
		@@ -253,8 +257,8 @@ sp<IBinder> RpcState::getRootObject(const base::unique_fd& fd, const sp<RpcSessi
		data.markForRpc(session);
		Parcel reply;

		status_t status = transact(fd, RpcAddress::zero(), RPC_SPECIAL_TRANSACT_GET_ROOT, data, session,
		&reply, 0);
		status_t status = transactAddress(fd, RpcAddress::zero(), RPC_SPECIAL_TRANSACT_GET_ROOT, data,
		session, &reply, 0);
		if (status != OK) {
		ALOGE("Error getting root object: %s", statusToString(status).c_str());
		return nullptr;
		@@ -269,8 +273,8 @@ status_t RpcState::getMaxThreads(const base::unique_fd& fd, const sp<RpcSession>
		data.markForRpc(session);
		Parcel reply;

		status_t status = transact(fd, RpcAddress::zero(), RPC_SPECIAL_TRANSACT_GET_MAX_THREADS, data,
		session, &reply, 0);
		status_t status = transactAddress(fd, RpcAddress::zero(), RPC_SPECIAL_TRANSACT_GET_MAX_THREADS,
		data, session, &reply, 0);
		if (status != OK) {
		ALOGE("Error getting max threads: %s", statusToString(status).c_str());
		return status;
		@@ -294,8 +298,8 @@ status_t RpcState::getSessionId(const base::unique_fd& fd, const sp<RpcSession>&
		data.markForRpc(session);
		Parcel reply;

		status_t status = transact(fd, RpcAddress::zero(), RPC_SPECIAL_TRANSACT_GET_SESSION_ID, data,
		session, &reply, 0);
		status_t status = transactAddress(fd, RpcAddress::zero(), RPC_SPECIAL_TRANSACT_GET_SESSION_ID,
		data, session, &reply, 0);
		if (status != OK) {
		ALOGE("Error getting session ID: %s", statusToString(status).c_str());
		return status;
		@@ -309,9 +313,31 @@ status_t RpcState::getSessionId(const base::unique_fd& fd, const sp<RpcSession>&
		return OK;
		}

		status_t RpcState::transact(const base::unique_fd& fd, const RpcAddress& address, uint32_t code,
		status_t RpcState::transact(const base::unique_fd& fd, const sp<IBinder>& binder, uint32_t code,
		const Parcel& data, const sp<RpcSession>& session, Parcel* reply,
		uint32_t flags) {
		if (!data.isForRpc()) {
		ALOGE("Refusing to send RPC with parcel not crafted for RPC");
		return BAD_TYPE;
		}

		if (data.objectsCount() != 0) {
		ALOGE("Parcel at %p has attached objects but is being used in an RPC call", &data);
		return BAD_TYPE;
		}

		RpcAddress address = RpcAddress::zero();
		if (status_t status = onBinderLeaving(session, binder, &address); status != OK) return status;

		return transactAddress(fd, address, code, data, session, reply, flags);
		}

		status_t RpcState::transactAddress(const base::unique_fd& fd, const RpcAddress& address,
		uint32_t code, const Parcel& data, const sp<RpcSession>& session,
		Parcel* reply, uint32_t flags) {
		LOG_ALWAYS_FATAL_IF(!data.isForRpc());
		LOG_ALWAYS_FATAL_IF(data.objectsCount() != 0);

		uint64_t asyncNumber = 0;

		if (!address.isZero()) {
		@@ -326,16 +352,6 @@ status_t RpcState::transact(const base::unique_fd& fd, const RpcAddress& address
		}
		}

		if (!data.isForRpc()) {
		ALOGE("Refusing to send RPC with parcel not crafted for RPC");
		return BAD_TYPE;
		}

		if (data.objectsCount() != 0) {
		ALOGE("Parcel at %p has attached objects but is being used in an RPC call", &data);
		return BAD_TYPE;
		}

		RpcWireTransaction transaction{
		.address = address.viewRawEmbedded(),
		.code = code,
		@@ -361,12 +377,12 @@ status_t RpcState::transact(const base::unique_fd& fd, const RpcAddress& address
		.bodySize = static_cast<uint32_t>(transactionData.size()),
		};

		if (!rpcSend(fd, "transact header", &command, sizeof(command))) {
		return DEAD_OBJECT;
		}
		if (!rpcSend(fd, "command body", transactionData.data(), transactionData.size())) {
		return DEAD_OBJECT;
		}
		if (status_t status = rpcSend(fd, "transact header", &command, sizeof(command)); status != OK)
		return status;
		if (status_t status =
		rpcSend(fd, "command body", transactionData.data(), transactionData.size());
		status != OK)
		return status;

		if (flags & IBinder::FLAG_ONEWAY) {
		return OK; // do not wait for result
		@@ -390,24 +406,22 @@ status_t RpcState::waitForReply(const base::unique_fd& fd, const sp<RpcSession>&
		Parcel* reply) {
		RpcWireHeader command;
		while (true) {
		if (!rpcRec(fd, session, "command header", &command, sizeof(command))) {
		return DEAD_OBJECT;
		}
		if (status_t status = rpcRec(fd, session, "command header", &command, sizeof(command));
		status != OK)
		return status;

		if (command.command == RPC_COMMAND_REPLY) break;

		status_t status = processServerCommand(fd, session, command);
		if (status != OK) return status;
		if (status_t status = processServerCommand(fd, session, command); status != OK)
		return status;
		}

		CommandData data(command.bodySize);
		if (!data.valid()) {
		return NO_MEMORY;
		}
		if (!data.valid()) return NO_MEMORY;

		if (!rpcRec(fd, session, "reply body", data.data(), command.bodySize)) {
		return DEAD_OBJECT;
		}
		if (status_t status = rpcRec(fd, session, "reply body", data.data(), command.bodySize);
		status != OK)
		return status;

		if (command.bodySize < sizeof(RpcWireReply)) {
		ALOGE("Expecting %zu but got %" PRId32 " bytes for RpcWireReply. Terminating!",
		@@ -447,9 +461,12 @@ status_t RpcState::sendDecStrong(const base::unique_fd& fd, const RpcAddress& ad
		.command = RPC_COMMAND_DEC_STRONG,
		.bodySize = sizeof(RpcWireAddress),
		};
		if (!rpcSend(fd, "dec ref header", &cmd, sizeof(cmd))) return DEAD_OBJECT;
		if (!rpcSend(fd, "dec ref body", &addr.viewRawEmbedded(), sizeof(RpcWireAddress)))
		return DEAD_OBJECT;
		if (status_t status = rpcSend(fd, "dec ref header", &cmd, sizeof(cmd)); status != OK)
		return status;
		if (status_t status =
		rpcSend(fd, "dec ref body", &addr.viewRawEmbedded(), sizeof(RpcWireAddress));
		status != OK)
		return status;
		return OK;
		}

		@@ -457,9 +474,9 @@ status_t RpcState::getAndExecuteCommand(const base::unique_fd& fd, const sp<RpcS
		LOG_RPC_DETAIL("getAndExecuteCommand on fd %d", fd.get());

		RpcWireHeader command;
		if (!rpcRec(fd, session, "command header", &command, sizeof(command))) {
		return DEAD_OBJECT;
		}
		if (status_t status = rpcRec(fd, session, "command header", &command, sizeof(command));
		status != OK)
		return status;

		return processServerCommand(fd, session, command);
		}
		@@ -505,11 +522,12 @@ status_t RpcState::processTransact(const base::unique_fd& fd, const sp<RpcSessio
		if (!transactionData.valid()) {
		return NO_MEMORY;
		}
		if (!rpcRec(fd, session, "transaction body", transactionData.data(), transactionData.size())) {
		return DEAD_OBJECT;
		}
		if (status_t status = rpcRec(fd, session, "transaction body", transactionData.data(),
		transactionData.size());
		status != OK)
		return status;

		return processTransactInternal(fd, session, std::move(transactionData));
		return processTransactInternal(fd, session, std::move(transactionData), nullptr /targetRef/);
		}

		static void do_nothing_to_transact_data(Parcel* p, const uint8_t* data, size_t dataSize,
		@@ -522,7 +540,7 @@ static void do_nothing_to_transact_data(Parcel* p, const uint8_t* data, size_t d
		}

		status_t RpcState::processTransactInternal(const base::unique_fd& fd, const sp<RpcSession>& session,
		CommandData transactionData) {
		CommandData transactionData, sp<IBinder>&& targetRef) {
		if (transactionData.size() < sizeof(RpcWireTransaction)) {
		ALOGE("Expecting %zu but got %zu bytes for RpcWireTransaction. Terminating!",
		sizeof(RpcWireTransaction), transactionData.size());
		@@ -538,14 +556,12 @@ status_t RpcState::processTransactInternal(const base::unique_fd& fd, const sp<R
		status_t replyStatus = OK;
		sp<IBinder> target;
		if (!addr.isZero()) {
		std::lock_guard<std::mutex> _l(mNodeMutex);

		auto it = mNodeForAddress.find(addr);
		if (it == mNodeForAddress.end()) {
		ALOGE("Unknown binder address %s.", addr.toString().c_str());
		replyStatus = BAD_VALUE;
		if (!targetRef) {
		target = onBinderEntering(session, addr);
		} else {
		target = it->second.binder.promote();
		target = targetRef;
		}

		if (target == nullptr) {
		// This can happen if the binder is remote in this process, and
		// another thread has called the last decStrong on this binder.
		@@ -558,18 +574,25 @@ status_t RpcState::processTransactInternal(const base::unique_fd& fd, const sp<R
		terminate();
		replyStatus = BAD_VALUE;
		} else if (target->localBinder() == nullptr) {
		ALOGE("Transactions can only go to local binders, not address %s. Terminating!",
		ALOGE("Unknown binder address or non-local binder, not address %s. Terminating!",
		addr.toString().c_str());
		terminate();
		replyStatus = BAD_VALUE;
		} else if (transaction->flags & IBinder::FLAG_ONEWAY) {
		if (transaction->asyncNumber != it->second.asyncNumber) {
		std::lock_guard<std::mutex> _l(mNodeMutex);
		auto it = mNodeForAddress.find(addr);
		if (it->second.binder.promote() != target) {
		ALOGE("Binder became invalid during transaction. Bad client? %s",
		addr.toString().c_str());
		replyStatus = BAD_VALUE;
		} else if (transaction->asyncNumber != it->second.asyncNumber) {
		// we need to process some other asynchronous transaction
		// first
		// TODO(b/183140903): limit enqueues/detect overfill for bad client
		// TODO(b/183140903): detect when an object is deleted when it still has
		// pending async transactions
		it->second.asyncTodo.push(BinderNode::AsyncTodo{
		.ref = target,
		.data = std::move(transactionData),
		.asyncNumber = transaction->asyncNumber,
		});
		@@ -579,7 +602,6 @@ status_t RpcState::processTransactInternal(const base::unique_fd& fd, const sp<R
		}
		}
		}
		}

		Parcel reply;
		reply.markForRpc(session);
		@@ -670,13 +692,17 @@ status_t RpcState::processTransactInternal(const base::unique_fd& fd, const sp<R
		it->second.asyncNumber, addr.toString().c_str());

		// justification for const_cast (consider avoiding priority_queue):
		// - AsyncTodo operator< doesn't depend on 'data' object
		// - AsyncTodo operator< doesn't depend on 'data' or 'ref' objects
		// - gotta go fast
		CommandData data = std::move(
		const_cast<BinderNode::AsyncTodo&>(it->second.asyncTodo.top()).data);
		auto& todo = const_cast<BinderNode::AsyncTodo&>(it->second.asyncTodo.top());

		CommandData nextData = std::move(todo.data);
		sp<IBinder> nextRef = std::move(todo.ref);

		it->second.asyncTodo.pop();
		_l.unlock();
		return processTransactInternal(fd, session, std::move(data));
		return processTransactInternal(fd, session, std::move(nextData),
		std::move(nextRef));
		}
		}
		return OK;
		@@ -704,12 +730,12 @@ status_t RpcState::processTransactInternal(const base::unique_fd& fd, const sp<R
		.bodySize = static_cast<uint32_t>(replyData.size()),
		};

		if (!rpcSend(fd, "reply header", &cmdReply, sizeof(RpcWireHeader))) {
		return DEAD_OBJECT;
		}
		if (!rpcSend(fd, "reply body", replyData.data(), replyData.size())) {
		return DEAD_OBJECT;
		}
		if (status_t status = rpcSend(fd, "reply header", &cmdReply, sizeof(RpcWireHeader));
		status != OK)
		return status;
		if (status_t status = rpcSend(fd, "reply body", replyData.data(), replyData.size());
		status != OK)
		return status;
		return OK;
		}

		@@ -721,9 +747,10 @@ status_t RpcState::processDecStrong(const base::unique_fd& fd, const sp<RpcSessi
		if (!commandData.valid()) {
		return NO_MEMORY;
		}
		if (!rpcRec(fd, session, "dec ref body", commandData.data(), commandData.size())) {
		return DEAD_OBJECT;
		}
		if (status_t status =
		rpcRec(fd, session, "dec ref body", commandData.data(), commandData.size());
		status != OK)
		return status;

		if (command.bodySize < sizeof(RpcWireAddress)) {
		ALOGE("Expecting %zu but got %" PRId32 " bytes for RpcWireAddress. Terminating!",

libs/binder/RpcState.h

+12 −6

Original line number	Diff line number	Diff line
		@@ -58,9 +58,13 @@ public:
		status_t getSessionId(const base::unique_fd& fd, const sp<RpcSession>& session,
		int32_t* sessionIdOut);

		[[nodiscard]] status_t transact(const base::unique_fd& fd, const RpcAddress& address,
		[[nodiscard]] status_t transact(const base::unique_fd& fd, const sp<IBinder>& address,
		uint32_t code, const Parcel& data,
		const sp<RpcSession>& session, Parcel* reply, uint32_t flags);
		[[nodiscard]] status_t transactAddress(const base::unique_fd& fd, const RpcAddress& address,
		uint32_t code, const Parcel& data,
		const sp<RpcSession>& session, Parcel* reply,
		uint32_t flags);
		[[nodiscard]] status_t sendDecStrong(const base::unique_fd& fd, const RpcAddress& address);
		[[nodiscard]] status_t getAndExecuteCommand(const base::unique_fd& fd,
		const sp<RpcSession>& session);
		@@ -115,9 +119,9 @@ private:
		size_t mSize;
		};

		[[nodiscard]] bool rpcSend(const base::unique_fd& fd, const char* what, const void* data,
		[[nodiscard]] status_t rpcSend(const base::unique_fd& fd, const char* what, const void* data,
		size_t size);
		[[nodiscard]] bool rpcRec(const base::unique_fd& fd, const sp<RpcSession>& session,
		[[nodiscard]] status_t rpcRec(const base::unique_fd& fd, const sp<RpcSession>& session,
		const char* what, void* data, size_t size);

		[[nodiscard]] status_t waitForReply(const base::unique_fd& fd, const sp<RpcSession>& session,
		@@ -129,7 +133,8 @@ private:
		const RpcWireHeader& command);
		[[nodiscard]] status_t processTransactInternal(const base::unique_fd& fd,
		const sp<RpcSession>& session,
		CommandData transactionData);
		CommandData transactionData,
		sp<IBinder>&& targetRef);
		[[nodiscard]] status_t processDecStrong(const base::unique_fd& fd,
		const sp<RpcSession>& session,
		const RpcWireHeader& command);
		@@ -165,6 +170,7 @@ private:

		// async transaction queue, _only_ for local binder
		struct AsyncTodo {
		sp<IBinder> ref;
		CommandData data;
		uint64_t asyncNumber = 0;